Joist support



' J. S. BIRCH l JOISTY SUPPQRT March 30,1926.- 1,578,256

Filed Oct. 5', 1925 vE TC! Jitmes 5 irchM Ev .fiE/E To allv uiiiom it may concern Patented Mar. 30, 1926.

iu NITEDISTA supports for the -supporting; joists 'upo'n TE S sir-nus amen, or

cmcaeo, rt'mr'rors JOI'ST SUPPORTr 5 Application filedi'qctober 5, 1925 Serial Nob-60,386;

.Be it -known that. I, JAMES citizen of the United States, and a resident of. the'city ot Chicago, in vthe county of Cook and Stateiof Illinois have invented -;certainnew and useful Improvements 111 a Joist Support; and I do hereby declare that the following is'a :tull clear, and enact description of the same reference being. had

-to;the'accompany1ng drawings, and to the numerals of reference marked .ithereon,

which form a part ofthis specification. p

In laying concrete floors in steel structures it has been the custom to first support beam forms in position around the horizontal I-beams, after which the joists for supporting the concrete floor forms are mounted in position uponjsupports which are built up upon the outer" sides of the beam forms thereby. requiring extensive carpentry work,

all of which must afterwards be ripped out.

This invention relates to improved steel whiclrfioor forms are supported, said joist supports adaptedto be readily engaged. upon theupper flange of an I-beam forming a partof the steel structure of a building, thereby obviating the'ex pensive temporary structural frame work supports hich have heretofore been used-to support the joists below floor forms. I

j 'I't'is .an ob ect it t ll-1S nvention toi provide an improved steel joist support adapted .to be readily engaged in position on the upper portion of an I-beam fto afford looped hangersin whichthe supportingljoists of a concrete floor for-m maybe. engaged;

Itflis also an object of; his inventionto pro vide a double joist support adapted to, be engaged upon the upper flange of an I-beam above a beam form to afi'ord looped hangers or supports in which thesupporting joists .of a floor form may be removably engaged support-comprising a pair of 'interfitting hangers-having members forming; a; part;

thereof which are adapted to be clamped against opposite sides ofthe upper flange of a structural I-heam to'hold the hangers ina position overhanging the side wallsqof a concrete beam ,formj' enclosing lotvervpelt tion of the structural I-befim;

o Other and further important objects of this invention will be apparent from the disclosures in the specification pany ng drawmgs",

This invention 'na preferredform) is.

illustrated in; the, drawings and hereinafter more fullydescribedp I Qn the dravvingsz and the. acc r Figure l is a fragmentary plan' flew-era j portion of a floor under construction 'illustr-ating a plurahty of joist supportsen gaged in position-on a pair of structure I-bearns for supportingfthe joists upon c whichthe floor forms are supported.

FigureQ is a fragmentary vertical detail section taken on line lL- ll 'of Figure 11 .Figure 3 is a fragmentary sectional view taken on line III-III 015 Figure :13 I

Figure 4 is an enlarged fragmentary detail section taken on line IV ;IV of Figure Ii On the drawin t he reference nu-ineralljndicatesa horizontal I-beain forming a part -ofthe'structural workof a building under construction. Surrounding the lower portion of the I-beam 1 is a woodeir beam form comprising-abettom 2 and side walls 3. The beam form is adapted to be supported in posit-ionhy any suitable means to permit concrete to be poured into the open upper portion of the beam-form and around the I-heain. v

, For the purpose of supporting a-.-woodei1 floor form 4 inposition between a pair of the l-beanisfl a plurality; oztjoists 5 are pa 1 v 'sitigoned between the I-Ybeams in parallel relat-ion to one another so that the floor form 4 may be constructedthereom The endsot the joists 5 abut against the outer sides of the side walls 3 of the beam form as clearly illustrated-inFigure 2.

For the purpose of supporting: the floor form supporting: joists 5 in position, ind? proved metal joist supports are provided which cow-er the patentable features of this invention. Theimproved joist support-comprises a pair of metal angle iron clamps 6; one jfiange of which is-providedwith two pairs of apertures l and a jpair of notches 8 alternately spaced with respect to thepairs of apertures 7. Connected to each of the angle iron clamps-6 is a steel metal U-shaped hanger. or strap 9 constructed {of a steel-rod,v the arms ofwhieh project-through the up per-most apertures 'of each of saidpair of apertures ,7 and are bent in thexform of a loop at and project back inwardly through-the lowermost apertures 7 with the ends 11 resting upon the inner face of the tured flange of an angle iron clamp 6 so that thegangle iron clamp 6 may be engagedagainst one longitudinal edge of the upper flange of the Ibeam 1 with the lower flange I of the angle iron clamped below the lower .inclined surface of the upper I-beamflange and f separated therefrom by the terminals 11; of; the hook members 1011, The'two arms- 0f each hanger "project transversely 7 across the top of the upper fiangeof the I beam 11 and are then'bent d'ownwardlyat an lan'glen'as illustrated in Figure 2 with the loop portion ofthe hanger directed down- 'wardly to the outside of the outer' surface 'of'one side wall '8 of the beam form 23.

A 'secondangleiron clamp-6 is engaged on f the opposite side' ofwthe top flange of the I-be:am 1lwith the hanger extending transversely'across the'top of the I-beam and then downwardly at an angle to position the looped end of the hanger 9 to the outside of the opposite side of the beam form The notches 8 provided in the angle iron clamps 6 are positioned to receive the arms of a coacting joist support member seated scribed comprises a pairof units, eachof which embraces an angle iron clamp G and a han e -9, with the arms of one'hanger adapted toseat in th'e notchesof thef'angle iron clamp of a-coacting joist "support unit; -The two joist support units 1 are positioned upon the upper flange of the l beam'l with the iron clamps'on opposite sides ofsaid flange, thereby permitting the arms of the hangers to -project transversely across the top of the beam flange,- withthe angle iron clamps 'clamped'adjacent' the longitudinal edges of the top flange of the I-beam. o The joist support units may thus be easily clamped" in, position uponthe top flange of an I-beam with the two hangers projecting downwardly'upon opposite'sides of the I- beam and to the outside of the side walls 3 oi? the beam form 2-8.

With a plurality of sets of joist supports clamped. in position as illustrated in Figure 1 upon the upper flanges "ofa pair of parallel -I-beams,the hangers 9 are so positioned that a supporting joist 5 may be seated in a pair of oppositely disposed hangers to span the space'between the adjacent side.

n walls of a pair ofbeam forms 2'-3 supported in position around. thelower portions oft-he two parallel I-beams. 7 Of course, any number of joistsupports may be engaged on wise than necessitated by the therein as-ill'ustrated in Figures 1 and 3.

The joist support its-illustrated and dethe ;I-beams so that a plurality ofjoists maybe readily'placed in position between a pair ofparallel beam forms with the ends of the joists abuttingagainst the sidewalls of said beam forms. "After a plurality of joists 5 have been supported in parallel relation between a pair of I-beams, a support is provideduponwhich the wooden floor form 4 for concrete floor maybe readily supported upon the joists 5 between -1the" woodenbeam forms 2-3 thereby completing the wooden formsnecessary for the-proper 1 the arms of the hangers 9 may be out below the floor forms 4 thereby permitting the supporting joists5 and the floor: forms 4 to be, removed from beneath theconcret'e '23 may be removed from below after which flooring. The angle clamps 6 and the upper portions of the hanger arms are of course embedded in the concrete flooring and re main in position to serve as reinforcing members. Y

I am aware that many changes may be' made, and numerous details of construction may be variedv through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherprior art. 7 I claim as my invention: f 1 '1. A oist support for a concrete floor form, said joist support comprising a pair of angle clamps adapted tobe en aged against opposite sides of the-upperange of a n I-beam, said ,anglef clamps having notches and f apertures therein, an'df'a pair of looped metal hangers, the arms of which are hooked and project through the aperjtures of said angle clamps with the arms 01 the hangers projecting transversely across the top otthe I-beam and seated in th notches of the opposite angle'clamp;

2. A joist support for concrete floor forms and the like, said joist support comprising a pair oflooped hangers, and a pair of apertu'red notched clamping members adapted to be clamped on the opposite sides of the 7 upper flange of an Ibeam with the arms of said hangers seated in the notchesof said clamping members and the ends of said arms bent to project through the apertures of the respective clamping members. I

3. A- joist support for floor forms comprising a pair of clamping members" having aperturesand notches therein and adapted to be positioned on opposite sidesof the top flange of an I bealn or the like,and a pair of hangers vfor receiving and supporting the joist supports of the 'floor' forms, said hangers having the arms thereof seated in the notches of one of saidclamping memhers with the endsof said arms hooked and projecting through apertures in the other of said clamping members to hold the hangers in position with the arms thereof spanning notches and apertures therein with the arms of said hangers seated in said notches and lockingly engaged through said apertures.

5. A joist support for concrete floor forms, said support comprising a pair of units each embracing an angle clamp, one flange of which is provided with a pair of notches and two pairs of apertures, and a U-shaped hanger, the arms of which are hook shaped and project through said pairs of apertures to permit the clam side of the upper theflange of said I-beam engaged between the arms forming said hooked portions.

6. A joist support for floor forms and the alike, said support comprising a pair of looped metal hangers adapted to be positioned on opposite sides of an I-beam, of a to be set adjacent one ange of an I-beam with be clamped against opposite sides offthe wooden beam form surrounding the lower 7 portion of the structural I-beam; and a pair. ofnot'ched clamping "members engaged on' the ends of said looped hangers-adapted to upper flange of the I-beam with the arms of said hangers projecting transversely across the top of the upper flange of the I-beam and seated in the notches formed in said clamping members. I

7. The combination with a steel structural member, of a beam form enclosin part of said member, floor forms positione against the opposite sides of said beam form,

joists supporting said floor forms and abutting against the sides of said beam form, apertured metal clamps engaged. on said steel structuralmember, and metal ha'ngerscon nected with said clamps and projecting across the top of said steel structural member in opposite directions and directed downwardlyon opposite sides of said beam form to .aflord supports forsaid joists.

1 Intestimony whereof I have hereunto sub-v scribed my name.

' JAMES S. BIRCH. 

